Beating engine for paper pulp and the like



Nov. 24,- 1931. w. THALER 1,333,053

BEATING ENGINE FOR PAPER PULP AND THE LIKE Filed Feb. 7, 1930 it s /4Patented Nov. 24, 1931 UNITED STATES PATENT OFFICE WILHELM THALEB, OFHEIDEHHEIE ON THE BBENZ, GERMANY, ASSIGNOR '10 AMERICAN VOITH CONTACT GODIG, 01' YORK NEW YORK, N. Y., A. CORPORATION OF NEW IBEATING ENGHE FOBPAPER PfiLP AND THE LIKE Application filed February 7, 1980, Serial No.

This invention relates to improvements in beating engines for paper pulpand the like and more articularly has for its object an accurateadjustment and measuring of the beating pressure.

It is of utmost importance for a methodical operation of half stuff andbeater stuff plants to continuously check the beating action so that allbeating -discharges show a uniform degree of beating and freeness ofthestuif required for theaproduction of a certain kind of paper. Aconstant operative control of the beater will be possible only byrepeated freeness tests or by constant measurement of the beatingpressure.

The adjustment and measurement of the beating pressure as per thisinvention is effected by a balancing device under the influenceof theweight of the beater roll, and their balance beams consist of onetwo-armed lever each, on one arm of which there is one bearing of thebeater roll, whereas on the other arm an adjustable balancing spring isacting in the sense of relieving the roll weight. Said spring isprovided with an indicating device. For completely raising the beaterroll from the bedplate, the springs, being adjusted for a determinedbeating pressure, are fixed in such a manner that the removing of thebeater roll from the bedplate can be done by the same device, thatserves to adjust the beating pressure.

A diagrammaticv sketch of such device is shown in the accompanyingdrawing.

The beater roll A is carried in two bearings D which are fixed on eachside on arm 5 of the balancing beams B. The latter are pivoted each onone of the single stands C placed next to center of roll. The other arm12 of the balancing beams B is connected with spring G by means of rodsE pivoted to connecting shaft (2 which runs across the beater. The rod Ein turn has pivoted thereto rod M to which is attached a. hollow stem N.

A spring G surrounds the rod N .and 'is held in position by an upperlate m and a lower spring plate g. A s eeve H con- 426,493, and inGermany February 16, 1929.

plate m. The hollow stem N is in engagement with a worm drive K whosemovement is controlled by a hand wheel L. The worm drive K is enclosed.It rests on the stand C. Attached to the rod M is an arcuate scale F onwhich the pointer of a tie rod J extendin through the top plate m downand onto t e bottom plate g moves so as to show at what beating pressurethe beater roll A is operating. It is to be noted that there is a gapbetween the bottom of the sleeve H and the spring plate g to allow forthe adjustment of the spring G. The 'pointer of the tie rod J willaccordingly indicate on scale F the pressure at which roll A is tooperate.

If the sleeve H is rotated downwardly against late 9', the rods M and Eand balancing eam B are moved so as to adjust the bearing pressure ofthe roll A. The pointer of the tie rod J will in turn show on the scaleF the working pressure; at which theroll A beats the paper to a pulp.

One advantage of this mechanism is that l}? turning the hand wheel L,the worm-drive moves rod M whereby beater roll A can be lifted withoutcausing any change in the pressure set by the increase of'tension onspring G around rod M. Since the tension on the spring G has been onceadjusted it is not necessary to reset the beater roll A to attainthefull work necessary to properly beat the paper pulp at the desiredpressure indicated by the pointer or rod J on scale F. In accordancewith this invention, a saving of time is effected by the use of thewormdrlve K to lift the roll A ever time a batch of pulp has been made,wit iout any loss of time in resetting the pressure at which 'the rollis to operate.

The lever B is connected with the lever E, which in turn is connectedwith the rod M. Upon the rod M is an upper spring plate m which isadjustable vertically and arranged to be adjusted. In the position ofthis plate m, which is determined by the operative condition of themachine, this plate m serves as an abutment which rests upon the up rend of a spring G. This spring 50 taining a handle ring at its upperpart is l screwed onto the outer edge of upper spring G on Its partrests upon a lower plate 9 which is connected with the machine frame.

rotation of a hollow spindle N. The turning of the spindle N is broughtabout bv a' worm-gear and worm-drive K, the latter being operated by thehand wheel L. The bore of this s indle N provides room for the entrance0 the rod M, which is ided in this bore. Upon the rod M is the in icatordevice F, the pointer of which is connected with the tie rod J ,-thelower end of which rests upon the lower plate 9.

By raisin the lower plate 9', the spring G ispne together, and theweight of the grinding roll is correspondingly decreased. The amount ofsuch sprin compression is determined by means of t e rod .J andindicator F, upon which indicator the 'remainin active weight of theroller is readily reada le.

- There is also provided a sleeve H which is provided with a handgrip onits upper portion, which sleeve is interiorly screwthreaded to en aegexterior screw threads of the plate m, and which allows between it andthe lower plate 9, a small spacing during the operation with thegrinding scale, so that the spring G can play. If sleeve H be screweddown to a tight seating with the lower late y then the train ofmechanism M, E, g are fixed to a definite lowermost position of theHollander-roll. .This corresponds to the usual grinding, whereby thespring does not play any more, the weight of the roller being moreoverpartially balanced or reduced to the amount of the beforeregulatedspring tension. The remaining, that is, active or working roller weightis indicated correctly also by this setting on the indicator F. I

This mechanism has the special advantage that with its help theHollander-roll can momentarily be lifted completely from the frame, byturning the hand wheel L and the worm-drive K, without causing a changein the settin of the spring in an manner. W'ithout this improvement, ateac 1 complete unloading of the Hollander-roll Wei ht, the spring Gwould have to be tensions up to the entire raising of the weight of theroller, which not only would mean a greater I loss in time, but also anew setting of the spring corresponding to the desired grindingpressure. But with the described improvement, it is possible to continueworking with the former grinding pressure, after relowering of theroller to a certain depth, and during the entire procedure the tensionof the spring remains the same, and, therefore, the setting of the samedoes not need any special attention.

Claims:

1. In .a beating engine for paper pulp and the like having a frame and abeater roll, the combination of a balancing beam piveted lessons to theframe having the beater roll journaled thereon near one end thereon-alever connected to the beam at the other end thereone of which ismovable towards the other,

the adjustment of which regulates the beating pressure of the beaterroll.

3. In astructure as defined in claim 1 the tension measuring deviceconsisting oi oppositely disposed upper and lower spring plates one ofwhich is movable towards the other, the adjustment of which regulatesthe beating pressure of the beater roll, and a sleeve for limiting themovement of the sprin plates in respect to each other.

4. n a beating engine for paper pulp and the like having a frame and aheater roll, the combination of a balancing beam pivoted to the framehaving the beater roll journaled thereon near one end thereof, a leverconnected to the beam at the other end thereof, a tension measuringdevice having spring plates oppositely disposed on said measuringdevice, a worm driven member for moving one of said spring plates, a tierod on one of said spring lplates, and an indicator for said tie rod, wereby said balancing beam may be moved to raise or lower said beater r0In testimony whereof I aflix my signature.

'WILHELM THALER.

